排水沥青混合料水稳定性能研究

Study on Water Stability of Drainage Asphalt Mixture

排水沥青路面采用大空隙的级配,具有减小雨天路面积水、抗滑、降低噪声的优点。对于空隙较大的沥青混合料,其抗水损害性能是决定路面耐久性关键。排水沥青路面采用开级配沥青混合料,选取的沥青是经过特色改性处理的高粘改性沥青,此类改性沥青可选用湿法和干法两种工艺,目前有较多的干湿法制备排水沥青混合料的方式,对这些方法进行一个全面的水稳定性能的对比,以对工程应用提供技术支撑。

The drainage asphalt pavement adopts the gradation of large voids,which has the advantages of reducing the water area of rainy days,anti-sliding and reducing noise.For asphalt mixture with large voids,its water damage resistance is the key to determine the durability of pavement.The drainage asphalt pavement uses open-graded asphalt mixture,and the selected asphalt is the high-viscosity modified asphalt treated by characteristic modification.This kind of modified asphalt can be used in wet and dry processes.At present,there are many ways to prepare the drainage asphalt mixture by dry and wet methods.A comprehensive comparison of water stability performance for these methods will be carried out to provide the technical support for the engineering applications.